Just done mine and everything seems to be OK.
One strange thing though, I have a 3, 3-2-1 sim in my Moto G and as soon as the update had finish I had a text message from 3 with internet and MMS settings to get me going

. It made it look as if I was a brand new customer to 3 as I got a welcome message too, yet the sim been in use for nearly 2 years now.
I’ve not bothered to use the 3 update to settings because the internet is working fine and I have the APN set so it can’t send MMS messages as WhatsApp is used to avoid the extortion that comes with MMS pictures.